<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        #l1{color: green}
        .c1{color: blue}
        h1,h2{background-color: yellow}
        input{color: pink}
        input[type='submit']{background-color: red}
        *{border: 1px solid blue}
    </style>
</head>
<body>
    <ul>
        <li id="l1">张学友</li>
        <li class="c1">刘德华</li>
        <li>郭富城</li>
    </ul>
    <h1 class="c1">悟空</h1>
    <h1>八戒</h1>
    <h1>沙僧</h1>
    <h2>刘备</h2>
    <input type="submit" value="提交按钮">
    <input type="button" value="普通按钮">
</body>
</html>